I haven't tested this on Vista, but it's working on Windows 2000/XP:
There's a cheat in minesweeper to activate a pixel in the top left corner of your screen, when you move your mouse over the mine field the pixel will become black if there's a mine, otherwise the pixel will be white ...

Enough talking, let's try the cheat:
Type xyzzy and press SHIFT-ENTER, this will do the trick ...
The cheat is now activated :P

Enjoy :) :P !!

Of all the games to cheat at... I don't know why minesweaper. But I tested this out and it IS true.

i used to use this on my friends, shocked the heck out of them for a while :)